My housemate makes pasta nearly every night, so we decided to optimize the process. We found that bringing the water to boil in a borosilicate flask in the microwave, adding the pasta and then returning it to the microwave with a pyrex bowl of the sauce and meatballs was the fastest and most economical method. I think from start to finish it takes 9 minutes total, 7 to bring the water to a boil and another 2 to reheat the sauce and cook the pasta. Something like 150 watts of power usage in a 1kW microwave.